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[Experimental study of histamine-liberating properties of eremomycin]
Abstract:
Eremomycin, a new glycopeptide antibiotic showed the same as ristomycin, polymyxins B and M and kanamycin histamine liberating properties. Liberation of endogenic histamine induced destructive lesions on the mucosa of the gastrointestinal tract. The most pronounced lesions were observed after intraperitoneal administration of the antibiotic. When eremomycin was administered intravenously or subcutaneously the affection of the gastrointestinal tract epithelium was less pronounced. After subplantar administration of the antibiotics pad edema in albino rats was observed. The most pronounced edema was after the use of ristomycin and the polymyxins. After the use of eremomycin and kanamycin it was at the average 2 times less pronounced. Preliminary administration of dimedrol decreased intensity of the pad edema induced by the antibiotics.
Insights
Eremomycin, a novel glycopeptide antibiotic, triggers histamine release, causing gastrointestinal lesions and pad edema in rats. Its effects are less severe than ristomycin and polymyxins, and can be mitigated by dimedrol.
Area of Science:
- Pharmacology
- Toxicology
- Microbiology
Background:
- Glycopeptide antibiotics, including eremomycin, are crucial for treating bacterial infections.
- Histamine liberation is a known side effect of some antibiotics, potentially leading to adverse reactions.
- Understanding the toxicological profile of new antibiotics is essential for safe clinical use.
Purpose of the Study:
- To investigate the histamine-liberating properties and associated toxicological effects of eremomycin.
- To compare the adverse effects of eremomycin with other antibiotics like ristomycin, polymyxins, and kanamycin.
- To evaluate the potential of dimedrol in mitigating antibiotic-induced edema.
Main Methods:
- Administration of eremomycin and other antibiotics (ristomycin, polymyxins B and M, kanamycin) via different routes (intraperitoneal, intravenous, subcutaneous, subplantar) in albino rats.
- Histological examination of gastrointestinal tract mucosa to assess lesions.
- Measurement of induced pad edema in rats.
- Pre-treatment with dimedrol to assess its effect on edema.
Main Results:
- Eremomycin, similar to ristomycin, polymyxins, and kanamycin, liberated histamine.
- Intraperitoneal administration of eremomycin caused the most pronounced gastrointestinal lesions.
- Subplantar administration induced pad edema, with eremomycin and kanamycin showing approximately half the severity compared to ristomycin and polymyxins.
- Preliminary administration of dimedrol reduced the intensity of antibiotic-induced pad edema.
Conclusions:
- Eremomycin exhibits histamine-liberating properties that can lead to gastrointestinal mucosal damage and peripheral edema.
- The severity of these adverse effects varies with the route of administration and the specific antibiotic.
- Dimedrol may offer a protective effect against antibiotic-induced edema, warranting further investigation.